安徽黄精属(Polygonatum)植物的分支分析

A cladistic analysis of Polygonatum from Anhui

以形态学为依据 ,结合细胞分类学、叶表皮和花粉形态的研究成果 ,用分支分析的方法探讨了安徽产黄精属 11种植物的种间演化关系。在分支分析中 ,选择万寿竹属、舞鹤草属和竹根七属作为复合外类群。根据复合外类群比较原则和一般演化规律 ,确定性状极性。结果表明 :( 1)琅琊黄精与长苞黄精为姊妹群 ,并与其余 9种黄精明显分为 2大支 ;( 2 )另一支 9种黄精中 ,玉竹、长梗黄精和金塞黄精亲缘关系密切并与其余 6种再分为 2支 ;( 3)剩下 6种黄精中 ,距药黄精和多花黄精 2种互生叶黄精极为密切并与 4种轮生叶黄精分为 2组 ;( 4 ) 4种轮生叶黄精中 ,黄精。

The present paper conducts cladistic analysis to evaluate the interspecific relationship of Polygonatum from Anhui, according to study of the herbarium and cytotaxonomy, pollen morphology, leaf epidermal characters. In cladistic analysis, the genera of Disporum, Maianthemum and Disporopsis of Polygonateae were chosen as complex outgroups. The polarty of characters was determined mainly according to complex outgroups comparison and generally accepted viewpoints of morphological evolution. It shows that P.longyaense is a sister group of P.desoulayi and be classified into two parts to 9 other species. It can be classified into three groups i e P.odoratum group, P.franchetii group and P.anhuiense group in the 9 other species.